Engines



(No Model.)

M M MOORE TAPPET FDR DUPLEX STEAM PUMPING ENGINES'.

Patented Jan. 10, 1893.v

No. 489,655.m

. Q w w Mmm MN 8 k Mm. ww Q mw UNITED STATES PATENT OFFICE.

MOSES M. MOORE, OF BELOIT, WISCONSIN, ASSIGNOR TO THE ECLIPSE WIND ENGINE COMPANY, OF SAME PLACE.

TAPPET FOR DUPLEX STEAM PUIVIPING-ENGINES.

SPECIFICATION forming part of Letters Patent No. 489,655, dated January 10, 1893.

Application tiled July 28, 1892.

To @ZZ whom it may concern.-

Be it known that I, MOSES M. MOORE, a citizen of the United States of America, residing at Beloit, in the county of Rock and 5 State of Wisconsin, have invented a certain new and useful Improvement in Tappets for Duplex Steam Pumping-Engines, of which the following` is a specilication.

In the accompanying drawings, wherein 1o like reference-letters indicate like parts, Figure l. is a vertical section of the engine, with the tappet-mechanism shown in side elevation; and Fig. 2. a vertical section of the tappet, in position on the valve-rod.

I5 In steam-engines, the idea of adjusting the length of stroke of the steam-valve by means of an adjustable tappet-device is an old one but the means adopted for carrying it into practice have been more or less objectionzo able-sometimes, by reason of their complexity and cost., and sometimes because they materially weaken the valve-rod, and render it liable to bend or break when in use.

The object of my invention is to produce a 25 tap pet-device suitable for the purpose, of simple and cheap construction, readily adjustable without the necessity of uncovering the steamchest, and not tending in any Way to weaken the valve rod.

To this end, my invention consists in the construction which I will now describe, and will more particularly point out in the claim hereto appended.

l In the drawings, C. indicates the cylinder;

35 P. the piston; P. the piston-rod; S. the steamchest; V. the steam-valve; V. the valve-rod;

L. the lever by which the piston-rod actuates the valve-rod; L'. the arm extending from lever L. to the tappet; and T., my improved 4o tappet-device. The construction of the latter is the subject of this invention, and will be understood from the following description.

On the valve-rod V. I fit a metal sleeve t., securing it firmly to the rod by pins a., or 45 other suitable means. The ends of the sleeve Serial No. 441,502. (No model.)

are screw-threaded externally, as shown at. 15'., and the intermediate portion smooth, and of uniform dimensions. On this sleeve fits a sliding tubular tappet-block 252., provided with a bored lug or lugs t3. for connection tothe 5o arm L. On the screw-threaded ends of the sleeve, I screw, at each end, a stout nut t4., having, preferably, a buffer t5. of leather or other suitable material, attached to its inner face. These nuts t can be locked firmly in any required position by means of jam-nuts t6., or other equivalent nut-locking device. The length of valvestroke is adjusted by setting the two nuts, t4. t4. at greater or less distance apart, and the throw of the valve is adjusted by setting both nuts nearer to, or farther from, the valve.

I am aware that this device has been somewhat approximated in an old device in which the nuts screwed directly upon the valve-rod, which was screwthreaded for that purpose. The practical objections to the old device were that the screw-threading weakened the rod, and that the rod is so small as not to give suitable bearing-surface for the sliding tappet-head*both of which objections are, in my device, obviated by reinforcing the rod with the sleeve, and using the latter as an enlarged bearing.

Having thus described my invention, what I claim as new, and desireto secure by Letters- Patent, is:--

The combination ot' the valve-rod with the sleeve t. fastened upon it, and externally screw-threaded at both ends; the nuts t4. screwed upon the sleeve, and provided with means for locking them in any adjusted positions; and the tappet-head t2. fitting and siiding upon the sleeve between said nuts, and actuated from the piston; substantially as described.

MOSES M. MOORE. Witnesses:

RoBT. ToDD, C. E. GOODWIN. 

